Standard Sheet for

DE LUXE

Edition 1000 (0999)

HERZ-Thermostatic and Return Valves“DE LUXE”

Thermostatic ValvesUniversal Models

H = DimensionHERZ thermostat

R = 1/2"

Thermostatic Valveswith Compression Union

H = DimensionHERZ thermostat

R = 1/2"Ø = 10–16

We reserve the right to makemodifications necessitatedby technological progress.

Valve Series“DE LUXE”

This series consists of HERZ radiator thermostats, HERZ-TS-90 thermostatic valves and HERZ returnvalves. These components all have a special smooth coating. A separate standard sheet is available for HERZ thermostatic heads DE LUXE.

7923

7958

7959 7928

7924

7923

7958 7959 7928

7924

Return ValvesUniversal Models

R = 1/2"

3725 3726

Return Valveswith Compression Union

R = 1/2"Ø = 10–16

3725

3726

Compression Union

6292 6284

HT=26,5+HHT=26,5+H

HT=26,5+H HT=26,5+H

HERZ ArmaturenRichard-Strauss-Straße 22 • A-1230 Wien

®

HERZ-TS-90Thermostatic Valves“DE LUXE”

Order Numbers

Order Numbers

Order Numbers

Special Colours

HERZ Return Valves“DE LUXE”

Compression Union

Universal ModelsRadiator connection with cone seal, special socket for threaded pipe and compression union, R = 1/2", with screw cap. Compression union 6292 for pipe external diameter 15 mm with coversleeve to be ordered separately.

Models with Compression UnionRadiator connection with cone seal R = 1/2", pipe connection with male thread M 22 x 1.5 for com-pression union, with crew cap and compression union cover. Compression union 6284 for pipeexternal diameters 10–16 mm to be ordered separately.

Explanations

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Universal Models

Colours Straight valve Angle model Reverse angle model

Valve to the left of radiator

Valve to the right of radiator

Chrome 1 7923 41 1 7924 41 1 7928 41 1 7958 41 1 7959 41

Anthracite (ruthenium plated) 1 7923 42 1 7924 42 1 7928 42 1 7958 42 1 7959 42

Gold 1 7923 43 1 7924 43 1 7928 43 1 7958 43 1 7959 43

White (RAL 9010) 1 7923 44 1 7924 44 1 7928 44 1 7958 44 1 7959 44

Black matt 1 7923 49 1 7924 49 1 7928 49 1 7958 49 1 7959 49

Models with Compression Union

Colours Straight valve Angle model Reverse angle model

Valve to the left of radiator

Valve to the right of radiator

chrome 1 7923 51 1 7924 51 1 7928 51 1 7958 51 1 7959 51

Anthracite (ruthenium plated) 1 7923 52 1 7924 52 1 7928 52 1 7958 52 1 7959 52

gold 1 7923 53 1 7924 53 1 7928 53 1 7958 53 1 7959 53

White (RAL 9010) 1 7923 54 1 7924 54 1 7928 54 1 7958 54 1 7959 54

Black matt 1 7923 59 1 7924 59 1 7928 59 1 7958 59 1 7959 59

Universal ModelsRadiator connection with cone seal, special socket for threaded pipe and compression union, R = 1/2", with screw cap. Compression union 6292 for pipe external diameter 15 mm with cover tobe ordered separately.

Models with Compression UnionRadiator connection with cone seal R = 1/2", pipe connection with male thread M 22 x 1.5 forcompression union, with crew cap and compression union cover. Compression union 6284 for pipeexternal diameters 10–16 mm to be ordered separately.

Universal Models Models with Compression Union

Colours Straight valve Straight valveAngle model Angle model

Chrome 1 3725 41 1 3726 41 1 3725 51 1 3726 51

Anthracite (ruthenium plated) 1 3725 42 1 3726 42 1 3725 52 1 3726 52

Gold 1 3725 43 1 3726 43 1 3725 53 1 3726 53

White (RAL 9010) 1 3725 44 1 3726 44 1 3725 54 1 3726 54

Black matt 1 3725 49 1 3726 49 1 3725 59 1 3726 59

For universal modelsCompression union cover (coloured), locking nut (male thread) and olive for pipe external diameter15 mm.

For models with compression unionLocking nut (female thread) and olive for pipe external diameters 10, 12, 14, 15 and 16 mm. Thecoloured compression union cover is supplied with the valve.

Special colours, colour combinations and other metallic coatings can be supplied upon request.

Universal Models Models with Compression Union

Colours Order Numbers For pipe external diameter Order Numbers.

Chrome 1 6292 41 10 mm 1 6284 00

Anthracite (ruthenium plated) 1 6292 42 12 mm 1 6284 01

Gold 1 6292 43 14 mm 1 6284 03

White (RAL 9010) 1 6292 44 15 mm 1 6284 04

Black matt 1 6292 49 16 mm 1 6284 05

HERZ-Thermostat- und Rücklaufventile „DE LUXE”

Radiator ConnectionIron pipe connection with cover cap and cover sleeve, with cone seal, installed.Spare part order number: 1 6210 44, without cap and cover sleeve.

1. Unlock the nut cover ring by shortly turning anti-clockwise. Subsequently, pull it back and slackenthe nut.

2. Install the connection with cover sleeve and nut cover ring by means of a 10 mm Allen key.

3. Unlock the socket sleeve by shortly turning anti-clockwise and remove it.Install the valve onto the threaded pipe and align.Slide the sleeve onto the valve and lock it by shortly turning clockwise.

4. Connect the valve and the nut and fasten by means of a 27 mm key. Slide the cover ring onto thenut and lock it by shortly turning clockwise.

Compression UnionConnections

Universal Models

Valves with CompressionUnion Connections

HERZ universal models are equipped with special sockets. They are suitable for connecting either athreaded pipe R = 1/2" or a calibrated soft-steel or copper pipe with an external diameter of 15 mm.The compression union 6292 must be ordered separately.

During installation, replace the socket cover ring of the valve with the compression union cover. The compression union cover (two parts) is snapped on after installation of the compression union.

Valves with connections for compression unions are fitted with a male thread M 22 x 1.5 on the pipeside and have been prepared for the installation of compression union 6284.

The compression union cover (two parts) is snapped on after installation of the compression union.

We recommend use of support sleeves for the installation of soft steel or copper pipes with com-pression unions. For perfect installation, it is imperative to lubricate the thread of the locking nut(male thread and female thread) as well as the olive itself with silicon oil. We refer to our instructionsfor installation.

Valve Installation

Order NumbersAccessories

Spare Parts

HERZ-TS-90 HERZ Return Valve

Compression union cover for models with compression union connection

Chrome 1 6280 51

Anthracite (ruthenium plated) 1 6280 52

Gold 1 6280 53

white (RAL 9010) 1 6280 54

Black matt 1 6280 59

O-ring set 1 6890 00 1 6810 90

HERZ changing tool 1 7780 00 1 7780 00For changing the O-ring and/or For changing

the thermostat upper part the O-ring

Keys 1 6807 90 1 6807 90For changing the O-ring and/or For changing

the thermostat upper part the O-ring

Radiator connection without 1 6210 44 1 6210 44cover cap and cover sleeve

Valve upper part 1 6390 91

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Operating Data

Compression Union

Max. operating temperature 90 °CMax. operating pressure 10 bar

Hot water purity in conformity with ÖNORM H 5195 or VDI-guideline 2035

When using HERZ compression unions for copper and steel pipes, observe the permissible tempe-ratures and pressures as specified in EN 1254-2:1998 Table 5.

Water heating systems. Field of Application

HERZ-TS-90-Thermostatic Valve “DE LUXE”

Special DesignFeatures

Spindle Seal

HERZ-Changing Tool

HERZ-TS-90O-Ring Chamber

InstallationThe thermostatic valve is installed in the radiator intake in such a way that the flow comes from thesocket side, or the compression union side. Wherever possible, the thermostatic head should be in ahorizontal position in order to guarantee optimum room temperature control with minimum interference.

Changing the Thermostatic Upper PartThe thermostatic upper part can be removed and/or changing by means of the HERZ-changing toolwhile the system is under pressure:• retrofitting the valve with a thermostatic valve upper part with fixed, stepped kv-value or with

an upper part with pre-setting function. This permits regulation of the radiator flow rate toindividual requirements;

• in order to clean the spindle seat seal and/or change the thermostatic upper part. This permitseasy removal of defects in thermostatic radiator valves, caused, e.g., by foreign substances suchas dirt, welding or soldering residues.

Follow the operating instructions supplied with the HERZ-changing tool.

An O-ring is used as a spindle seal. It is located in a brass chamber which can be changed duringoperation. The O-ring keeps maintenance requirements at a minimum and permits lasting ease ofvalve operation.Changing the O-Ring Chamber1. Remove the HERZ-thermostatic head.2. Unscrew the O-ring chamber with the O-ring and replace with a new one. During this change

use a wrench to hold the upper part. After removal of the thermostatic head the valve is com-pletely open and therefore sealed tight towards upstream. However, a few drops of water mayleak out.

3. For re-assembly follow the above steps in reverse sequence.Order number of O-ring set: 1 6890 00

4

HERZ-Thermostatic Valve

Nominal Lift

The screw cap serves for operation during the installation phase (pipe flushing). The thermostaticvalve is formed by removing the screw cap and screwing in the thermostatic head without draining theheating system.

Setting the nominal lift with the screw cap:On the knurled part of the circumference of the screw cap there are two setting marks (webs) inalignment with the “+” and “–” marks.1. Close the valve by turning the screw cap clockwise.2. Mark the position corresponding to the setting mark “+”.3. Turn the screw cap anti-clockwise until the setting mark “–” is at the position marked under item 2.

kv-Value TableReturn Valves“DE LUXE”

Pre-setting step = Return Valve 3725 Return Valve 3726turns Straight Version Angle Version

0.25 0.12 0.12

0.5 0.3 0.3

0.75 0.5 0.5

1 0.65 0.65

1.25 0.9 0.9

1.5 1.1 1.15

1.75 1.35 1.5

2 1.55 1.75

2.5 1.9 2.2

3 2.1 2.5

open 2.3 2.8

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HERZ Return Valves “DE LUXE”

Field of ApplicationThe return valve permits shut off on the radiator return connection. When both, the intake and returnvalves are shut off (thermostatic head in position “0”) the radiator can be removed while the systemis under pressure without having to close off the rest of the system.The return valve permits exact control of the water flow rate through the radiator in accordance withthe desired heat output, as well as hydraulic balancing of the system.

Shutting off the RadiatorAfter removing the cover plate, the valve spindle is screwed in completely by turning it clockwisewith a screwdriver.Any pre-setting steps must be set again after opening the valve.

Pre-Setting1. Unscrew cover plate.2. Screw the valve spindle in completely with a screwdriver. After doing so, the valve is shut.3. Unscrew the valve spindle by means of a screwdriver in accordance with the value to be set

(according to diagram); e.g. for pre-setting step 3 make 3 anti-clockwise turns.4. Re-install cover plate.The valve spindle is secured against unintended unscrewing.

Spindle Seal

Changing theO-Ring Chamber

An O-ring is used as a spindle seal. It is located in a brass chamber which can be changed duringoperation. The O-ring keeps maintenance requirements at a minimum and permits lasting ease ofvalve operation.The O-ring chamber is changed by means of the HERZ changing tool. For detailed instructions con-sult the operating instructions supplied with the HERZ changing tool, item “HERZ-DE-T-90-Changingthe O-Ring”.

Seat SealThe seat seal is metallic and therefore wear.resistant.

Anti-Tamper SecurityThe valve is protected against unauthorized operation by a plastic screw cap.

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HERZ ArmaturenRichard-Strauss-Straße 22 • A-1230 Wien

®

HERZ-Standard Diagram

Art. No. 7923 · 7924 Dim. DN 15 R=1/2"

HERZ-TS-90

Valve dimensioning [∆ p] has to be performed in accordance with the “VDMA-Instruction Sheet for Planning and Hydraulic Balancingof Heating Systems with Thermostatic Radiator Valves” (∆ p max. = 0.2 bar).

kv-value

Standard flow rate qm

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.

Pre

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∆p

7

HERZ ArmaturenRichard-Strauss-Straße 22 • A-1230 Wien

®

HERZ-Standard Diagram

Art. No. 3725 Dim. DN 15 R=1/2"

HERZ-Return Valves

Die Ventilauslegung [∆ p] ist entsprechend dem „VDMA-Merkblatt über Planung und hydraulischen Abgleich von Heizungsanlagenmit thermostatischen Heizkörperventilen“ vorzunehmen.

kv-value

Pre

ssur

e dr

op

∆p

Standard flow rate qm

We

rese

rve

the

right

to m

ake

mod

ifica

tions

.

HERZ ArmaturenRichard-Strauss-Straße 22 • A-1230 Wien

®

HERZ-Standard Diagram

Art. No. 3726 Dim. DN 15 R=1/2"

HERZ-Return Valves

kv-value

Pre

ssur

e dr

op

∆p

Standard flow rate qm

We

rese

rve

the

right

to m

ake

mod

ifica

tions

.